3-32A SHUNT is a physically large, low-resistance conductor connected in parallel with the meterterminals. It carries the majority of the load current so that only a small portion of the total current willflow through the meter coil.An AMMETER measures current and is always connected in series with the circuit being measured.An ammeter should have a low resistance so that the effect of the ammeter on the circuit will be kept to aminimum.VOLTMETERSare used to measure voltage and are always connected in parallel with the circuitbeing measured. A voltmeter should have a high resistance compared to the circuit being measured tominimize the loading effect. Voltmeter sensitivity is expressed in ohms per volt.OHMMETERSare used to measure resistance and to check continuity. An ohmmeter is electricallyconnected in series with the resistance being measured. The ohmmeter range, which allows a midscaledeflection, should be used.A MEGOHMMETER (MEGGER) is used to measure very high resistance, such as the insulationof wiring.A WATTMETER is usually an electrodynamometer and is used to measure power.